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Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length

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2013
Authors
Džunuzović, Enis S.
Džunuzović, Jasna
Radoman, Tijana S.
Marinović-Cincović, Milena
Nikolic, Ljubisa B.
Jeremić, Katarina B.
Nedeljković, Jovan M.
Article (Published version)
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Abstract
Incorporation of surface modified TiO2 nanoparticles into polystyrene (PS) matrix was achieved by in situ bulk radical polymerization of styrene. The surface of TiO2 nanoparticles was modified with four amphiphilic esters of the gallic acid (octyl, decyl, lauryl and cetyl gallate), which have different lengths of hydrophobic alkyl chain (C8C16). FTIR and UV-Vis spectroscopy measurements confirmed the formation of a charge transfer complex between surface Ti atoms and gallic esters. Microstructural characterization of the synthesized nanocomposites revealed that the best dispersion of TiO2 nanoparticles in PS was achieved when the TiO2 surface was modified with octyl gallate. The presence of surface modified TiO2 nanoparticles by different alkyl gallates does not have an influence on the molecular weight and glass transition temperature of PS matrix. On the other hand, thermal and thermo-oxidative stability of PS were significantly improved by incorporation of surface modified TiO2 nano...particles. The most pronounced improvement of thermal and thermo-oxidative stability was observed for TiO2 nanoparticles surface modified with octyl gallate. POLYM. COMPOS., 2013.

Source:
Polymer Composites, 2013, 34, 3, 399-407
Publisher:
  • Wiley-Blackwell, Hoboken
Projects:
  • Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-45020)
  • Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)

DOI: 10.1002/pc.22423

ISSN: 0272-8397

WoS: 000315197100012

Scopus: 2-s2.0-84874108903
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1296
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